If we are naturally biased and limited in how rational our decision making can be, it might be more effective to improve intuition and manage biases rather than trying to completely eliminate them and focus on unbiased thinking.

Improving intuition is beyond me. Buckminster Fuller claimed it was key, and you might get some information out of his works. The limits of rationality as a skill and as a trend are good to know as something that exists.

But when it comes to identifying error (bias) as a tool for lessening error I don't know that you can do better than Karl Popper. I started with 'Conjectures and Refutations' but also like 'In Search of a Better World' and, well, most of his books.